Event: Open County Championship

Opponent Rating Result
Stephen W Ruthen 1898 1 - 0
Anthony Chan 1760 1 - 0
Brian J Valentine 1959 1 - 0
James Pack 1897 ½ - ½
Jose Pedro Vieira 1879 1 - 0
Robert S Walker 1767 1 - 0
performance = (sum(opponents ratings) + 400(wins-losses)) / games

2193 = (11160 + 400 * (5 - 0)) / 6)

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